Symptoms

NetWorker Module for Databases and Applications (NMDA) MongoDB backups fail. The backup shows: monogdb_client:<save_set> size 0 KB, 0 file(s), took 0 min 31 sec One or more of the following errors is observed: The size of proxied data written has not been set. Backup of ssid 'xxxxx' failed due to unrecoverable errors. The read operation returned a value of -1. Error code: 5. Error: Input/output error. Backup of ssid 'nnnn' failed due to unrecoverable errors The backup command '/nsr/apps/config/backup_logscript.sh' did not complete successfully: Backup of ssid 'nnnn' failed due to unrecoverable errors. 

Cause

The backup script is redirecting output to a file using >.

Resolution

Use --out for the file output instead of directing the output to a file. Example script section. Change: ( set -x; EXEC_MYWORK="$INSTANCE_PATH_MW16_MYWORK/mongodump -u $BACKUP_USER -p $BACKUP_PASSWORD --authenticationDatabase $BACKUP_AUTHDB --gzip --port 27020 --db local --collection oplog.rs --query \"{ts: {\\\$gt: {\\\$timestamp: {t: $PASS_TIME, i: 0}}, \\\$lt: {\\\$timestamp: {t: $CURR_TIME, i: 0}}}}\" > $OAPP_MOUNT_DIR/backup_data_Oplog"; eval $EXEC_MYWORK; ) To: ( set -x; EXEC_MYWORK="$INSTANCE_PATH_MW16_MYWORK/mongodump -u $BACKUP_USER -p $BACKUP_PASSWORD --authenticationDatabase $BACKUP_AUTHDB --gzip --port 27020 --db local --collection oplog.rs --query \"{ts: {\\\$gt: {\\\$timestamp: {t: $PASS_TIME, i: 0}}, \\\$lt: {\\\$timestamp: {t: $CURR_TIME, i: 0}}}}\" --out $OAPP_MOUNT_DIR/backup_data_Oplog"; eval $EXEC_MYWORK; )

Support Cases